#include <fstream.h>
int main()
{
unsigned long n, nr, x, d;
ifstream f("next.in");
ofstream g("next.out");
f>>n>>d;
x=n/d;
if(n%d==0)
  g<<n;
else
  {nr=d*(x+1);
   g<<nr;}
f.close();
g.close();
return 0;
}